Compilare: user.cpp: In function ‘bool CP(char*)’: user.cpp:35:13: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]=='E') ^ user.cpp:39:13: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]==')') ^ user.cpp:42:13: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]==']') ^ user.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^